- Fixed the crash issue when opening certain PDFs.- Optimized the reading engine and fixed the issue where the scrolling becomes very slowly when reading large PDFs.- Users will not be prompted to set default PDF reader when either or both Phantom and Foxit Reader is installed. - PDF icons are reverted to other Reader¡¯s PDF icons when Foxit Reader is uninstalled, if those exist.- Fixed the issue where the system sets Foxit Reader as the default PDF viewer without user permission when Foxit Reader launches.